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Finding the Fourth Proportional to 15,004.14, 20,706.13 and 8,290.20

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Solution

The fourth proportional to 15,004.14, 20,706.13 and 8,290.20 is: 11,440.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,004.14 : 20,706.13 = 8,290.20 : x
  2. Step 2: Convert to fraction form
    15,004.14/20,706.13 = 8,290.20/x
  3. Step 3: Cross multiply
    15,004.14x = 20,706.13 × 8,290.20
  4. Step 4: Simplify right side
    15,004.14x = 171,657,958.93
  5. Step 5: Solve for x
    x = 171,657,958.93/15,004.14
  6. Step 6: Final answer
    x = 11,440.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.